Flame-regulator for lamps.



- *No. 758,299. PATENTED APR.26,1904.

I A. GORTIS.

FLAME REGULATOR FOR LAMPS.

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No- 758,299. PATENTED APR. 26, 1904.

P. A. CURTIS.

FLAME REGULATOR FOR'LAMPS.

APPLIUAIIOH FILED JAN. 28, 1904.

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UNITED STATES Patented April 26, 1904."

PATENT Car es.

FRANK A. CORTIS, OF MERIDEN, CONNECTICUT.

FLAME-REGULATOR FOR LAMPS.

SPECIFICATION forming part of Letters Patent No. 758,299, dated April 26, 1904.

Application filed January 28,1904. Serial No. 190,934. [No model.)

To aZZ whom it may concern:

Be it known that I, FRANK A. CoR'rIs, of Meriden, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Flame-Regulators for Lamps; and I do hereby declare the following, when taken in connection with the accom panying drawings and the figures of reference marked thereon, to be a full, clear, and exact description of the same. and which said drawings constitute part of this specification, and represent, in

Figure 1, a top or plan view of a flame-regulator for lamps, showing the shutters in the closed position; Fig. 2, a side view of the same; Fig. 3, an under side view of the cap and regulator detached, with the shutters closed; Fig. 4, a similar view with the shutters open; Fig. 5, a broken transverse seclarly for spirit-lamps, such as are used with chafing-dishes and other cookmg utensils 1n which it is desirable to regulate the extent of the flame, the object of the invention being the construction of a device conveniently operated and in which the adjacent edges of the shutters are in the same plane and moved in parallel paths; and the invention consists in certain details of construction and combination of parts, as will be hereinafter described, and particularly recited in the claims.

In illustrating my invention I have shown it as applied to a spirit-lamp 2, which maybe of any approved construction, having a cap-- plate 3, in which is a circular flame-opening d, with slots 5 on opposite sides through which the shutters extend, and a clearance-opening 6 for the operating-levers. Within the cap are two shutters 7 andB, the shutter 7 having arms 9 and 10, and the shutter 8 having corresponding arms 11 and 12, these arms projecting inward and overlapping each other, the arms and sides ofone shutter, as 8, being depressed to the extent of the thickness of the metal of the arms 9 and 10 of the other shutter, so that as the arms of the shutters slide one upon the other the edges 13 and 1 L of the shutters will meet in the same plane and abut against each other. These shutters are supported within the cap 3 by plates 15 and 16, secured thereto, the edges of the plates being depressed to form guide-shoulders 17 and 18 for the arms of the 27 of the levers, and at its forward end with a finger 28, adapted to'enter between camsurfaces 29, formed in the inner edges of the levers at a point between their pivots and the edge of the cap 3. As a convenient means for moving the cams I form the slide 25 with a screw 30, which extends rearward through the wall 31 of the arm into a handle 32, which is swivelly mounted in the wall and formed at its forward end with a nut 33, so that the turning of the handle will draw the screw and move the slide back and forth. As the slide moves forward the cam 26 is forced between the ends 27 of the levers, forcing those ends outward and their inner ends toward each other, so as to move the shutters toward each other and close the openingd in the cap. As the slides are guided transversely through the cap their meeting edges are always parallel and in the same plane. The reversal of the handle moves the slide outward and draws the finger 28 against the inclined surface 29 of the inner edges of the levers, forcing those levers apart and causing them to move the shutters outward, so as to uncover the opening a in the cap.

Instead of using a swiveled handle and a srcew to operate the slide 25 that slide may I be provided with an upwardly-projecting finger-piece 34:, as shown in Fig. 7, this fingerpicce being in convenient position to be moved back and forth by the operator and moves the cams to turn the levers in the same way as above described, or instead of employing a slide with two cams to operate the levers the two cams may be formed on the ends of a segmental rocker. Thus, as shown in Figs. 9 and 10, a rocker 35 is mounted in the arm 23 upon a pivot 36 and provided at opposite ends Withcams 37 and 38, which act upon the projecting ends of the levers in front and rear of their pivots to move them in the same way as the cam and finger before described, this rocker having a knurled surface 39, by which it may be conveniently turned by pressure of the thumb 9r finger upon it. It Wzlll be noted that by pivoting the levers at a point outside the cap the parts may be very conveniently assembled and the cost of manufacture thereby reduced. I would therefore have it understood that I do not wish to be understood as limiting the invention to any particular two shutters having inwardly-projecting overlapping arms, the meeting edges of the shutters arranged in the same plane.

2. A flame-regulator for lamps comprising two shutters having inwardly-projecting overlapping arms, the arms of one shutter offset whereby the meeting edges of the shutters will stand in the same plane.

3. In a flame-regulator for lamps the combinationwith the lamp and cap thereof, of two shutters and levers connected therewith for operating the same, said levers turning on pivots arranged outside the cap.

4. In a flame-regulator for lamps the combination with the lamp and cap thereof, of two transversely-movable shutters, levers for operating the same, said levers mounted on pivots outside the cap, and cams for turning the said levers, substantially as described.

5. In a flame-regulator for lamps, the combination with the lamp and cap thereof, of two transversely-1novable shutters, levers connected therewith and extending beyond said cap, a slide carrying cams for turning said levers, a screw projecting from said slide, and a bandle engaging with said screw and adapted to turn the same whereby theslide is moved, substantially as described.

6. In a flame-regulator for lamps, the combination with the lamp-body and cap thereof -.having a flame-opening, transverse shutters scribed.

In testimony whereof I have signed this speclfication 1n the presenceof two subscribing witnesses.

FRANK A. CORTIS.

Witnesses: V

FREDERIO C. EARLE, CLARA L. WEED. 

